How to play the game

User Interface Elements

In the right pane of the Game Panel above, you see (from top to bottom):

Four or more rows, containing digits or Boxes:

The top row of Boxes is for borrows during subtraction.

The next row contains the number from which you will be subtracting. You can click on the digits of this number to borrow during subtraction

The next row contains the number to be subtracted.

The bottom row of Boxes is for the results of the subtraction.

A Green Status Box - that gives you helpful real-time information as you play the game.

In the center and bottom of the left pane, you see:

A 'New Question' Button to generate a new Subtraction problem.

A 'Reset Parameters' Button to reset the game parameters (Difficulty-Level, Time-Limit, and other game-specific parameters) to their values at the start of the current Question. This button is disabled to begin with. It becomes enabled as soon as you change a game parameter.

A Stop-watch that tells you how much time you have taken on the current problem.

A Score-card that tells you your score for the current session. The Score-card reports your grades and scores separately for the different question difficulty levels: 1 - Easy, 2 - Middling, 3- Hard.

A Clear Score button to reset the Score-card.

A Print Score For button that prints out the Score-card. You can optionally provide a name to be printed on the Score-card page.